摘要：
一天"select * from T_news where datediff(day,addtime,getdate())=0";三天"select * from T_news where datediff(day,addtime,getdate())<= 2 and datediff(day,addtime,getdate())>= 0";一周"SELECT * FROM T_news WHERE (DATEPART(wk, addtime) = DATEPART(wk, GETDATE())) AND (DATEPART(yy, 阅读全文
